Ten things we learned from F1 practice

Who is winning the battle to be second behind Mercedes? Has McLaren-Honda made any progress? And will Manor race after all? AUTOSPORT's F1 team analyses Friday's running in Australia

To nobody's great surprise Mercedes drivers topped the first official practice sessions of the 2015 Formula 1 season, but Friday in Australia threw up several fascinating storylines.

The revival of Ferrari, McLaren-Honda's stuttering start and the phoenix-from-the-ashes return of Manor-Marussia meant there was plenty to look out for across the three hours of practice at Albert Park in Melbourne.